This was an exploratory, descriptive, cross-sectional study to assess sleep quality in 100 patients with venous ulcers using the Pittsburgh Sleep Quality Index (PSQI). Thirty-six (36%) patients had a global PSQI score < 5, indicating that they were good sleepers, while 64 (64%) patients were considered poor sleepers. Fifty-three (53%) patients reported going to bed between 9:00 pm and 11...

• Evaluation of the behaviour a railway track supported by alternative sleepers. Use ballast box test to represent single sleeper section track. Digital Image Correlation technique for measuring sleepers’ deflection profile. Sleepers with low modulus will have W-shape Local deformation at rail seat can account up 10 % total deflection. Alternative technologies replacement timber are made materi...

The wheel-rail-sleepers system is simulated as a series of moving point loads on an Euler–Bernoulli beam resting on a visco-elastic half space. This paper concentrates on the railsleepers interaction system (railway system) and the fault detection. The main objective is to mathematically develop and implement a dynamic model of a railway system then the diagnosis of system defects using a Luenb...

We validated a Fitbit sleep tracking device against typical research-use actigraphy across four nights on 38 young adults. Fitbit devices overestimated sleep and were less sensitive to differences compared to the Actiwatch, but nevertheless captured 88 (poor sleepers) to 98 percent (good sleepers) of Actiwatch estimated sleep time changes. Bland-Altman analysis shows that the average difference...

Track thermal buckling is one of the primary safety issues continuously welded rail tracks. It has been shown that transition zones open deck steel bridges are more prone to track buckling, as loads from bridge and lower lateral resistance in this region can destabilize plane. The aim paper assess possibility reinforcing ballast layer with geotextiles mitigate problem zones. To do so, a number ...

also in our study ‘good sleepers’ have Hb values significantly higher than the ‘poor sleepers’, even if they do not reach the values obtained by Iliescu et al.: this confirms that a clinical trend to a better sleep quality exists by raising Hb levels. In summary, although the data of statistical analysis must be clearly kept in mind, to raise Hb levels above our reported values remains a possib...

Alternative sleeper technologies have been developed to address the significant need for replacement of deteriorating timber railway sleepers. The review literature indicates that sleepers might fail while in service, despite passing evaluation tests current composite standards which indicated these do not represent situ on ballast. In this research, a new five-point bending test is evaluate fl...

During the last decades, the railway traffic in densely populated areas has increased. At the same time, passenger trains have become faster and freight trains have become heavier. Consequently, trains are an increasing source of ground vibration, which may be a nuisance to people, buildings and sensitive equipment. In this research, a two-dimensional dynamic system, including underground train...